Sealing a brick wall

[troutstudio]

I have an interior garage wall with a lot of little gaps in the mortar. Prior to adding drywall, what's the simplest way to fill them? Cement and then expanding foam around the beams? Thanks.

[DavidC77]

Dealing with a similar thing myself, and about to embark on sealing it up too.

From the forum and other advice I've received, the best option appears to be rendering the inside of the wall - a mix of good render with something like bondcrete to make sure it sticks and stays airtight.

http://www.cementaustralia.com.au/wps/w ... -grey.html
http://www.bondall.com/concrete-additives/bondcrete/

Don't use expanding foam around the beams - it's expansion is all gas bubbles and isn't necessarily air tight or flexible. Best to render close to the beams leaving a small 5mm gap, then filling the gap around the beam with acoustic caulk once the render has set.

Hope that helps

[Soundman2020]

Excellent advice, David. Spot on, with every point. Thank you. And welcome to the forum!

- Stuart -